The "Habitat" learning system was designed by TVOntario's Children's Programming department for junior-level students. It consists of 20 programs (each 15 minutes long), a teacher's guide, and a magazine for students. Three major objectives of the series were to (1) instruct children in scientific principles relating to habitats; (2) make children aware of what scientists do; and (3) encourage children to take an interactive role with animals. This report examines the educational effectiveness of the learning system, ascertains the acceptability of the thematic approach and its potential application, and examines the use and implementation of the system in the classroom. Data were collected from focus groups and field testing groups. Both focus group and field test group teachers approved the learning system as a whole. Teachers' reactions on strengths and weaknesses, teaching strategy, and print materials of the program are reported. Students were administered pre- and post-tests containing questions about demographic characteristics, attitudes toward science and scientists, and knowledge of science. The "Habitat" Learning System did not change students' attitudes toward science. Students did learn about animals and their habits, and were interested in the new information on animals. Recommendations for the learning system, the programs, the printed materials, and further research are suggested. Summaries of this document in both English and French are included. (YP)